What you’re seeing
- The USB-C monitor shows "No signal" or "No USB Type-C signal" while the laptop may still charge through the cable.
- Windows does not list the monitor in display settings at all.
- The picture appears only after unplugging and replugging the cable, or after a restart.
- The problem began after a Windows update, driver update or BIOS update.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- The laptop's USB-C port does not support DisplayPort Alt Mode or Thunderbolt video output.
- The USB-C cable supports charging and data but not video, or only at a low bandwidth.
- The graphics or Thunderbolt driver was replaced or broken by a Windows update.
- Laptop BIOS, Thunderbolt firmware or monitor firmware is out of date.
- Power delivery negotiation fails, causing the monitor to drop the video connection.
- The monitor's USB-C input is disabled or set to a different input mode in its menu.
Why it matters
Single-cable USB-C monitors are popular because they charge, connect and display in one plug, so when they fail the whole desk setup fails with them. Users may lose access to the keyboard, mouse and network attached through the monitor too. Inconsistent behavior makes the problem seem random, which wastes time on repeated restarts. If several laptops share the same model and update, the issue can spread across the office overnight.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Why does the laptop charge but not show a picture?
Power and video travel over different parts of the USB-C connection, so charging can work while video negotiation fails or is not supported.
Can a Windows update really cause this?
Yes, updates that replace graphics or Thunderbolt drivers are a common trigger for USB-C display problems.
Who can sort out the drivers and firmware for us?
A certified US engineer works through drivers, firmware and settings with you over a remote secure session, from $99, and you pay only when resolved.